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| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -1 |
| 5 | 2 |
| 6 | -1 |
| 7 | 3 |
| 8 | 3 |
| 9 | -1 |
| 10 | 4 |
| 11 | 19 |
| 12 | 4 |
| 13 | -1 |
| 14 | 5 |
| 15 | 80 |
| 16 | 65 |
| 17 | 5 |
| 18 | -1 |
| 19 | 6 |
| 20 | 286 |
| 21 | 566 |
| 22 | 181 |
| 23 | 6 |
| 24 | -1 |
| 25 | 7 |
| 26 | 945 |
| 27 | 3710 |
| 28 | 2905 |
| 29 | 455 |
| 30 | 7 |
| 31 | -1 |
| 32 | 8 |
| 33 | 2997 |
| 34 | 20756 |
| 35 | 31781 |
| 36 | 12636 |
| 37 | 1079 |
| 38 | 8 |
| 39 | -1 |
| 40 | 9 |
| 41 | 9294 |
| 42 | 105299 |
| 43 | 278304 |
| 44 | 218559 |
| 45 | 49754 |
| 46 | 2469 |
| 47 | 9 |
[-1,-1,1,-1,2,-1,3,3,-1,4,19,4,-1,5,80,65,5,-1,6, 286,566,181,6,-1,7,945,3710,2905,455,7,-1,8,2997, 20756,31781,12636,1079,8,-1,9,9294,105299,278304, 218559,49754,2469,9] |